There's a plethora of wonderful documentaries. I made a point of not looking at anyone else's portrayal of Henry because I think it would have been too confusing - so I've got a lot of films to look forward to.

It really depends on the director. I think quite often, it's not what you expect. The most serious film can be the most fun. The one that's supposed to be fun can be the most serious. I don't think there are any hard-and-fast rules. I just think it really depends on your director and what the general vibe is.

I think you need to be able to see a lot of negative in things in order to extract material, so there's probably something to that. A lot of the people I used to work with were very, very, very unfunny offstage, so that's a pretty common thing.

I think if you had to map that out at the beginning and you said, "Right, sit down, this is what you're going to be doing," you'd probably freak out. But I'm someone who really enjoys not being himself. So if you consider that, then it all sort of makes sense.

I guess I'm a very keen observer, and I'd like to think I have a good imagination.

I never really think much about the size of a production because I think as an actor, once you're in it, it's all the same. I never ever pick projects based on their size.

I tend not to read the size of the production into a script when I'm reading it. It's just something you respond to or not and I do think it's very dangerous to say it's time now to do this or it's time now to do that.

Definitely the script because you want to be part of an interesting story, you want your character to be a challenge, then comes the director. But essentially it's the script first and whether it's a character that you think you can do.